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nikitadnepr [17]

2 years ago

14

5 Which of the following must be transformed into electrical energy when biomass is used as an energy resource? * DS (20 Points)

A chemical energy B. mechanical energy O C. nuclear energy D. radiant energy

1 answer:

Lemur [1.5K]2 years ago

3 0

Answer:

nuclear energy

Explanation:

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A 1.80-kg monkey wrench is pivoted 0.250 m from its center of mass and allowed to swing as a physical pendulum. The period for s

asambeis [7]

Answer:

$I=0.0987kg.m^2$

Explanation:

From the question we are told that:

Mass $M=1.80kg$

Deviation $d=0.250$

Time $t=0.940s$

Generally the equation for moment of inertia is mathematically given by

$I=\frac{T}{2\pi}^2(mgd)$

$I=\frac{0.94}{2.3.142}^2(1.80*9.8*0.250)$

$I=0.0987kgm^2$

5 0

3 years ago

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svlad2 [7]

Burning of paper is the answer

6 0

2 years ago

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A pen contains a spring with a spring constant of 270 N/m. When the tip of the pen is in its retracted position, the spring is c

vodka [1.7K]

Answer:

-0.9045 j

Explanation:

Here K= 270 N/m

distance 1 = 4.60 mm=0.0046 m

when pen is compressed ;

distance 2 = 6.70 mm + distance1 = 0.0067 m+0.0046 m= 0.0113 m

The pen store in itself two types of PE

Which is Initial PEi = 1/2 ×K× [ $distance 1^{2}$ =0.5×270×0.0046 =0.621 j

and Final PEf = 1/2 × K × $distance 2^{2}$ = 0.5×270×0.0113=1.5255 j

When the pen gets ready - it goes ahead distance d2 and is then pressed back distance d1 for writing.

Total PE when ready = 0.621-1.5255= - 0.9045 j

so, work = -0.9045 j

8 0

2 years ago

How far would a spacecraft moving in a circular orbit 500 km above Pluto's surface travel during that time?

Ilia_Sergeevich [38]

Answer:

The speed of the spacecraft should be 719.35m/s

Explanation:

if the spacecraft is orbiting the planet with a circular orbit, the gravitational force must act as a centripetal force. This means:

$F_G=F_c\\\frac{GmM}{d^2}=m\frac{v^2}{d}$

In this case, the pluto's mass M is 1.3099·10^22 kg. The radius of the planet R is 1188.3Km and G is the gravitational constant. Therefore:

$\displaystyle\frac{G M}{d^2}=\frac{v^2}{d}\\v=\sqrt{\frac{GM}{d} } =\sqrt{\frac{GM}{(R + 500km)} } =719.35m/s$

7 0

2 years ago

A biology student views several different prokaryotic and eukaryotic cells under a microscope. How do the prokaryotic cells appe

Fofino [41]

Answer:

The prokaryotic cells are smaller than the eukaryotic cells.

Explanation:

Its just the simple process of elimination. Prokaryotic cells lack of a lot of things, including mitochondria, so it couldn't be option C. BOTH prokaryotic and eukaryotic cells have cytosol AND ribosomes, so the answer couldn't be D or A, and you're left with option B. Meaning option B is the correct choice.

7 0

3 years ago